No one here can predict how you're going to feel out dressed. Whether its in a complete formal gown and outfit, t shirt and jeans, or a man wearing nothing but a sundress .
Go out wearing what u think will make u the most comfortable. Here's your back up plan:
If u, your friend, or the folkxs around u stress u out? Go home. Think about what you'll do next time that u didn't do this time. Then, if that doesn't work either, try something else.
If u never get comfortable going out dressed you're a closet dresser. Don't fret. Most of us r.
But I get the feeling from your post you'll get comfortable out there in no time!